Trying to catch the feel of one of those "makes random stuff" SCPs and keep it original, while also making it something that is safe when handled correctly but has the potential to be very dangerous when misused (throwing those cubes into the ocean, for example, doesn't sound like a good idea). It's also one of those SCPs where the test logs give most of the material for the article.
I kinda like the idea behind this one (and I love how you used ultramarine as a color, it's underused), but the description of the freezing process could be shortened a little. A brief example: "SCP-XXX's anomalous properties manifest upon the freezing of any liquid commonly known as water…"
Other than that I did enjoy this article, it just needs a little shoe polish.
But I'm still new here, so take it with a grain of salt.
I'd think "how much liquid can this affect?" would be an early research priority. If it's fixed at some reasonable value — a gallon per cube, or some such — then this is Safe, sure enough. If there's no limit, though, then it's really a Keter-class object, because you could destroy the planet's biosphere by tossing a a cube into the ocean.
Other obvious lines of research would include using different solvents and combining cubes.
— I have to say, I don't love the idea. Makes random stuff, sure. But this seems too random. Personally, I kinda like the SCPs where there seems to be some underlying (if alien) logic behind its actions. But chaque a son gout — the Foundation's a big place.
There is some logic into how the matter is converted; most importantly the color of the used cube determines the general category of results. I might add an addendum after the test log to include notices on how the used colors correspond with certain results (as of now, I've decided something along that blue hues generally make some sort of "alien energy drinks" that have weird effects on the drinker's body, green hues tend to make materials with low boiling points, producing mostly gases under room temperature and black means general nastiness).
And add moar tests (different solvents, different amounts of liquid, moar colors etc). If this becomes an actual article, I might have to make the test log a separate page or at least put it under one of those openable things to lessen the wall of text effect.